David Ryan created LUCENE-9320:
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Summary: Enable support the Java module system by adding
module-info to projects
Key: LUCENE-9320
URL: https://issues.apache.org/jira/browse/LUCENE-9320
Project: Lucene - Core
Issue Type: Improvement
Components: core/other
Affects Versions: master (9.0)
Reporter: David Ryan
To allow Lucene to be modularised with Java module system there are a number of
tasks to be completed prior to this being possible. These are detailed by Uwe
on the mailing list here:
[http://mail-archives.apache.org/mod_mbox/lucene-dev/202004.mbox/%3c0a5e01d60ff2$563f9c80$02bed580$@thetaphi.de%3e]
The preparatory tasks are detailed in:
# LUCENE-9317
# LUCENE-9318
# LUCENE-9319
Once these are complete and the move to Gradle is completed the following steps
are required to make Lucene modules:
{quote}As we are on Java 11 already, add module-info.java everywhere
Fix gradle build to create and test modules (Latest Gradle needed)
++++Migrate all META-INF/services/* to module-info.java (before doing this,
figure out of the META-INF files must stays for non-module usage, or if Java is
clever enough to also look into module descriptor to find services). We may
need all services at both locations (for module or classpath usage; we need a
build helper to check that it’s in-line)
{quote}
As an interim step it is also possible to add Automatic-module-name to
libraries to stop Java from using an invalid name. This can be done in Gradle
by adding:
{quote}ext.moduleName = "com.acme.mylibrary"
jar {
inputs.property("moduleName", moduleName)
manifest {
attributes 'Automatic-Module-Name': moduleName
}
}{{}}
{quote}
This has the advantage that if you're not ready to add module-info.java to
projects you can reserve the module name. Users of the library using modules
will not be required to update for the Java automatic name based on the jar
file name (e.g. lucene.core ) to the new name (e.g. org.apache.lucene.core )
h1.
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